Blade attachment for rotary shaper



Jan. 24, 1956 c. F. CERKLESKI 2,731,990

BLADE ATTACHMENT FOR ROTARY SHAPER HEADS Filed Alilg. 3, 1953 ff g a3 w J45 Z7 I \u INVENTOR.

United States Patent Office 2,731,990 Patented Jan. 24, 1956 BLADE ATTACHMENT FOR ROTARY SHAPER HEADS Chester F. Cerkleski, Norridge, Ill. Application August 3, 1953, Serial No. 372,001

2 Claims. (Cl. 144-218) The present invention relates generally to a spindle shaper attachment for drill presses and the like, but more particularly to a novel and improved shaper blade holder in which a variety of blades of different contour or configuration in the work so as to produce different rosettes or different patterns or moldings.

Another object of the invention is to provide a novel and improved spindle shaper attachment which is adapted to detachably and rigidly secure the blades in the holder thereof in two different positions.

A further object of the invention is to provide a novel and improved spindle shaper attachment for drill presses and the like which provides means therein for readily attaching or detaching the blades in the holder thereof.

These and other objects are accomplished by providing a construction and an arrangement of the various parts in the manner hereinafter described and particularly pointed out in the appended claims.

Referring to the drawings:

Fig. 1 is a front elevational view of my shaper blade holder showing a blade detachably secured therein;

Fig. 2 is a side elevational view of the same;

Fig. 3 is a top plan view of the same;

Fig. 4 is an end elevational or bottom view of the same;

Fig. 5 is a cross sectional view taken on the lines 55 in Fig. 1;

Fig. 6 is a cross sectional view taken on the lines 66 in Fig. 2;

Fig. 7 is a front elevational view of the holder showing the manner in which the detachable blade may be supported on the side of the holder;

Fig. 8 is a cross sectional view taken on the lines 8--8 in Fig. 7;

Fig. 9 is a cross sectional view taken on the lines 99 in Fig. 8, and

Fig. 10 is a plan view of a fragmentary portion of one of the blades.

In illustrating one form my invention may assume in practice, I have shown the same as comprising a main frame or tool holder, generally indicated by the reference character 10, which includes a cylindrical shank 11 suitably adapted to be secured to the chuck of a drill press or the like in the manner well understood in the art. Formed integrally with the shank 11 is an enlarged cylindrical head or blade holder portion 12. The shank 11 is provided with a longitudinally extending bore 13 which terminates at its upper end in the relatively larger cylindrical recess 14. The lower end of the bore 13 terminates in a conically shaped bore 15 which is located within the cylindrical head 12 for the reception of a conically shaped blade holder hereinafter described. Communicating with the conically shaped bore 15 in the head 12 is a right angularly disposed conically shaped bore 16, the axis of which is at right angles to and intersects the axis of the bore 13 and the conically shaped bore 15. This bore 16 is for the purpose of holding the blade holder in position on the side of the tool holder 10 in the manner hereinafter more fully described. Located transversely on the lower end of the head 12 and across the diameter thereof is a rectangular recess 17 in which is adapted to be seated the inner edges 18 of a blade 19. The cutting edges of these blades may assume any configuration, depending on the type or pattern the operator desires to form on the wood or other materials so worked on. For example, Fig. 10 illustrates, as shown at 20, a different type of blade that might be employed. As a matter of fact, there may be any number of these blades with different contour or configuration which may be attached to the spindle shaper holder.

Formed integrally with each of the blades is an upwardly projecting portion 21 which has tapered sides, as shown at 22. The portion 21 of each of the blades 19 and 20 are adapted to be inserted in a diametral recess 23 of a conically shaped holder 24. Located in the axial center of the conically shaped holder 24 is an internally threaded bore 25 in which the threaded end of a bolt 26 is mounted. The bolt is adapted to extend through the longitudinal bore 13 of the shank 11 and is provided with a head 27 which is adapted to be seated in the cylindrical recess 14 of the shank 11. The head 27 of the bolt 26 may be provided with a hex recess for the insertion of a tool or a transverse screw driver slot may be provided in the head 27 to actuate the bolt for securing the holder 24 together with the blade 19 in position. prevent displacement of the cutter blade 19 from the holder 24, a transverse pin 28 may be inserted in the aligned apertures 29 in the blades 19 and the holder 24.

From the above description it will readily be seen that by securely fastening the bolt 26 into the threaded portion 25 of the conically shaped holder 24, the tapered walls 15 of the head 12 will rigidly wedge or clamp the knife 19 in the holder 24 in position on the head 12 of the shaper holder and the pin 28 will further insure against displacement of the blade 19 from its position in the holder.

The construction shown in Figs. 1 to 6 inclusive show the manner in which the blade is supported in the lower end of the holder 12 by the bolt 26. In this position various types of blades may be supported in the holder for cutting various patterns of rosettes. In Figs. 7, 8 and 9 the blade 19 is supported on the side of the holder head 12. In this connection the head is provided with a vertical rectangular recess 30 on the periphery thereof which extends diametrally across the outer end of the conical recess 16 of the head 12. Extending in axial alignment with the conical recess 16 is a diametral bore 31 in the head 12. This bore 31 terminates in a relatively larger concentric cylindrical recess 32 for the reception of a threaded screw 33. The inner end of the threaded screw 33 is adapted to engage the internal threaded bore 25 of the conically shaped blade holder 24 for securing the blade 19 and the holder 24 in place on the head 12.

From the above description it will be obvious that when the bolt 26 is removed from the construction shown in Fig. 6, the blade 19 may be transferred from the position shown in this figure to the side of the head 12 to the position shown in Fig. 9 of the drawings and the screw 33 is inserted in the bore 31 for securing the blade 19 and holder 24 in position, as shown in this figure.

Summarizing the construction and functions of operation of my improved spindle shaper attachment, it will be obvious that a very wide variety of shapes or configurations of cutting blades may be mounted in In order to further secure and and rigidly secured and clamped in the lower end of the holder for the cutting of various shapes of rosettes or may be easily detached" and placed in the side of the holder so that various configurations or shapes of strips of Wood material or the like may be formed by securing the knife on the side of the head as illustrated in Figs. 7 to 9 inclusive of the drawings. The blade holder thus provides a wide range of uses and patterns by merely substituting ditferent blades or by supporting the blades in the two different positions on the holder.

While in the above description I have illustrated and described one embodiment which my invention may assume in practice, it will, of course, be understood that various other modifications may be made Without dcparting from the spirit and scope of the invention as expressed in the following claims.

What I claim as my invention and desire to secure by Letters Patent is:

1. A tool holder comprising a shank and a head, a longitudinal conical bore in said head, a transverse slot across the lower end of said head intersecting diametrically the wider end of said bore, a conical blade holder mounted in said bore and having a diametral slot across the wider end thereof, a blade having a tapered shank and oppositely extending shoulders, said shank extending into the slot in said blade holder with its side edges flush with the conical surface of said holder and said shoulders engaging in said transverse slot of the head, and a bolt extending through said shank and head and engageable with a threaded bore in the narrow end of said conical blade holder for securing said blade and holder to said tool.

2. A tool holder comprising a shank and a cylindrical head, a transverse conical bore in said head, an axially directed slot on one side of said head intersecting the wider end of said conical bore, a conical blade holder mounted in said conical bore and having a diametral slot across the wider end thereof, a blade having a tapered shank and oppositely extending shoulders, said shank extending into the slot in said blade holder with its side edges flush with the conical surface of the holder and said shoulders engaging in the axially directed slot in said head, and a bolt extending through the transverse bore in said head and engageable with a threaded bore in the narrower end of said blade holder for securing said blade and blade holder at right angles with respect to the axis of said head.

References Cited in the file of this patent UNITED STATES PATENTS 308,703 Richardson Dec. 2, 1884 391,894 Gulledge Oct. 30, 1888 565,789 Owen et al. Aug. 11, 1896 1,583,967 Epps May 11, 1926 1,661,788 Coibion Mar. 6, 1928 2,395,628 Kocher Feb. 26, 1946 2,487,696 Coiling Nov. 8, 1949 2,584,492 Newton Feb. 5, 1952 2,655,964 Labbee Oct. 20, 1953 

